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Re: Compiling and Linking Dynamically-Loaded Functions on Windows

From: Robert Haas <robertmhaas(at)gmail(dot)com>
To: Mariano Reingart <reingart(at)gmail(dot)com>
Cc: pgsql-docs(at)postgresql(dot)org
Subject: Re: Compiling and Linking Dynamically-Loaded Functions on Windows
Date: 2010-09-12 00:37:04
Message-ID: AANLkTikT9ibzgZPCeHd7k=xd5Bq7KW5mzeejeK8_rz_O@mail.gmail.com (view raw or flat)
Thread:
Lists: pgsql-docs
On Wed, Aug 25, 2010 at 4:04 PM, Mariano Reingart <reingart(at)gmail(dot)com> wrote:
> There is no Windows (MSVC or MinGW) section to compile shared libraries (DLL):
> http://www.postgresql.org/docs/9.0/static/xfunc-c.html#DFUNC
>
> This is intentional, as it may be incompatible/hard?
> Ie. can mingw dll be used with a msvc build?
>
> This is a working example with mingw:
> C:\mingw\bin\gcc.exe -O2 -Wall -Wmissing-prototypes -Wpointer-arith
> -Wdeclaration-after-statement -Wendif-labels -fno-strict-aliasing
> -fwrapv -I. -I. -I../src/include -I.../src/include/port/win32
> -DEXEC_BACKEND "-I.../src/include/port/win32" -c -o foo.o foo.c
> C:\mingw\bin\gcc.exe -shared -o foo.dll foo.o
>
> -fPIC seems not needed for this platform, but should -mms-bitfields
> flag be used?
>
> PGXS cannot be used directly as it is not included with the one click
> installer (pg_config --pgxs returns an invalid path, no makefile
> found).
>
> Do you think this could be included in the docs?
> (recently we had a discussion about this in the spanish mailing list,
> and seems to be unclear for most of us).

If we can figure out what the right thing to do is, +1 from me for
adding it to the docs.  But the discussion of what the right thing to
do is should probably happen on pgsql-hackers, rather than here.

-- 
Robert Haas
EnterpriseDB: http://www.enterprisedb.com
The Enterprise Postgres Company

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